Allayne grew up in rural South Australia. She is the recipient of three SA Arts grants, a board member of the Salisbury Writers' Festival, and she established the Women's Professional Development Network Book Club at the University of Adelaide. Allayne's middle-grade novel Paper Planes was a 2016 CBCA Notable Book and shortlisted for the Adelaide Festival Children's Awards for Literature. Sensitive is her third middle-grade novel, eighth publication.